Novel approaches to diagnosing and treating Neonatal Abstinence Syndrome (NAS) are needed for reducing prolonged pharmacological management, minimizing hospitalization and improving developmental outcomes in drug exposed newborns. This study seeks to examine the physiology and symptoms of drug withdrawal (e.g., irritability marked by movement activity; cardio-respiratory instabilities) in infants exposed to drugs in utero and test whether sensory stimuli (tactile, auditory) reduce dysregulated systems in the withdrawing infant.